Configuring gated
Configuring the RIP Protocol
Configuring the RIP Protocol
RIP uses hopcount to determine the shortest path to a destination. Hopcount is the number of routers a packet must pass through to reach its destination. If a path is directly connected, it has the lowest hopcount of 1. If the path passes through a single router, the hopcount increases to
2.Hopcount can increase to a maximum value of 16, which is RIP’s infinity metric, an indication that a network or node cannot be reached.
If gated encounters an unreachable node, it goes into Holddown Mode. Holddown Mode stops a node from propagating routing information until the other nodes that it is communicating with stabilize their routing information.
Hosts with only one LAN interface may use the RIP protocol with gated to passively listen to routing information when multiple routers on the LAN exist. If only one router on the LAN exists (leaving only one path off the local LAN), you can configure a static route to that router in the /etc/rc.config.d/net file, or issue the route command manually, instead of running gated.
In certain cases, you may not want the traffic to follow a certain path, because it incurs an unacceptable cost or security risk. In these cases, gated allows you to assign a metric to each interface. This allows you to select or bypass a path, irrespective of its length or speed.
RIP Protocol Statement
The syntax of the RIP protocol statement is as follows:
rip yesno onoff [ { broadcastnobroadcast ; nocheckzero ; preference preference ; defaultmetric metric ;
query authentication [none[[simplemd5] password]] ; interface interface_list
[noripin][ripin] [noripout][ripout] [metricin metric] [metricout metric] [version 1][version 2 [multicastbroadcast]] [[secondary] authentication [none[simplemd5] password]
] ;
[interface ...]
50 | Chapter 3 |